I have tried those as basic steps, didn't work. So, we finally opened up a case with the support, and we figured out a bug. It is only happening with the new tenant creation. The support staff has also found the issue on his sandbox. The workaround was when you see cards are not loading and frozen, just keep refreshing the page until all the steps are completed (either dismiss or click to configure) and then finally we saw the congratulations screen and close button.
